Improvement in lasting-machines



` UNITEDl STATES PATENT CFT-Ionc FREDERIC S. HUNT, OF LYNN,MASSACHUSETTS.

IMPROVEMENT IN LASTlNG-MACHINES.

Specication forming part of Letters Patent No. 171,810, dated January 4,1876 application liled l December 21, 1875.

To all whom t may concern:

Be it known that I, FREDERIC S. HUNT, of Lynn, Massachusetts, haveinvented certain Improvements in Machines for Lasting Bootsv and Shoes,of `which the following is a specilication:

The purpose of this machine is to supersede hand labor in the lasting ofboots and shoes, not by stretching the entire upper over the boot, as iscustomary in most lasting machinery, but by stretching such upper at onepoint at a time only, practically as is now accomplished by hand labor;a second object of this machine being to tack the upper to the last atthe point where, and the time when, the said upper is stretched.

To this end I employ, first, a last-supporting jack, mounted upon thetop of an adjustable post, and adapted to carry a last, over which theupper is to be stretched and tacked or lasted 5 secondly, of a vibratoryor swing ing beam or carriage, carrying at top a head, which is providedwith an elastic adhesive pad or cushion, and so disposed with respectVto the lasting-jack, or the gage or stop which determines the positionof such jack, that, with each forward swinging motion of the beam andhead, the pad wipes against the upper at one point and stretches it overthe edge of the last; thirdly, in the combination, withthe swinging beamand its head, of a reciprocating bolt or tack-driver, operated bysuitable mechanism, in such manner that, as the stretchingghead ot' themachine reaches its extreme outward position, the driver descends anddrives the tack through the upper and into the last.

The drawing accompanying this specification represents, in'Figure 1, aside elevation of my machine. Fig. 2 is an eleval ion of the upper partof the same from the other side. Fig. 3 is-a rear elevation. Fig. 4 is afront eleva* tion of the upper part of the machine.- Fig. 5 is aperspective view of the cam which controls the barv that operates thehammer-lever.

In these drawings, A A' represent two upright housings or standards,erected upon a suitable base, B, united by crossbars C D, and at the topby a cross-beam, E. The last-supporting jack is shown at F as mountedupon the upper end of an upright swinging rod orA bar, G, which isstepped at bottom in a pedal,`

H, suitably pivoted to the-lower cross-bar U of the machine-frame, whilethe last is shown at I as applied to the jack, the construction of;

-such jack being similar to many now in use,

and being retained in an upright position when not in use by a chainattached to it and the machine-frame.

The upper which isto be lasted is placed l about the last I, and theadjustable or varia# ble support of the jack enables the positionv ofthe last and upper to be varied at pleasure 5 but, as it isr desirablethat a uniform height of the bottom of the last with respect to thestretching-head shall be maintained, I atlix to the front of thecross-beam E a gage or stop composed ot' a l'urcated or. channeledabutment, U. The horizontal horns a a of the latter, which determine theheight ot' thel last, overhang the said last, and permit. the

stretchinghead to pass between them in the. act ofturningand rubbingthev edge ot' the upper over upon the last.

The stretching-head before alluded te is shown at J as a rectangularblock mounted horizontally upon the upper end of a swinging or vibratorybeam, K, erected upon a horilzontal rock-shaft, L, which is journaledwithin the standards A A at the front. of the latter, and at aboutmidway of their height; the

lower front edge of the head J being covered down upon the last.

To effect the requisite vibratory motion of the beam K and head J, Iconnect 011e of the journals of the rock-shaft L, outside ofthe standardA', to one end of a crank, N, to the opposite end or wrist-pin c ot'which I pivot one end of a pitinan, 0, the opposite end of such pitmanbeing, in turn, pivoted to the wrist-pin d l of `a crank-wheel, P, whichis mounted upon the journal ofahorizontal conn- `tershaft,`1, such shaftbeing mounted in` t the shank c2 of the head and the upper part of thebar K in a tubular sleeve, d2, and applying a spring, d3, in a suitablemanner to draw the, head down 5 and Inext ax to one endof the shaft R acrank or crank-wheel,e1, to the wrist-pin of, which I pivotone end of a,pitman, e2, the opposite end of such pitman being, in turn, pivoted tothe lower end of an arm or crank, f2, whose upper end is afxedY to the iouter extremity of a horizontal rockshaft, g2, while to the inner end ofsuch shaft I aix therear end of a crank, h2, to the front end of whichcrank I pivot the lower end of an upright rodor bar, t2, whose upper endis forked, and embraces a lateral stud, k2, projecting from the side ofthel head J; the arrangement of the sleeve d2, crank e1,f2,.and h2, androds e2 and 2 being such that each rotation of the shaft R produces arocking of the shaft g2, and such rocking'of thelatter shaft istransmitted to the head J to raise the latter from olf the last or theupper upon it,` the mechanism being so timed that the rod or bar i liftsthe head at the moment the latterreaches its extreme forward position,and immediately prior'to its return.

I propose to combine with this machine a` device for tacking the upperto the last simultaneously with the turning over of the Vupper upon thelatter; and to this end I employ a vertical bolt, l2, which plays withinan orifice in the front of the head J, and to and fro thereof withrespect to the last jack below; this bolt being depressed by a'. properspring, and actuated by a lever, m2, which is fnlcrumed to the top ofsaid head by` a pivot, n2, and engages` the bolt, as shown in thedrawings, the rear end of the handle o2 of this lever being operated insuch manner that, as the head moves forward, the `bolt is held at itshighest point, and restrained from falling until such head has completed`its forward movement and stroked the edge of the upper of the boot overupon the last, when the handler? is released, and the bolt immediate-`ly descends and drives the tack.` i V To actuate the hammer-lever Iemploy an upright oscillating bar, p2, pivoted atpa to the inside of theframe, and arranged to vibrate to and'from the Stroker J. It is provided`at its upper end with a stud or projecting pin, g2, which wipes oroperates at proper times the hammer-lever. The bar p2 isoperated by adouble wedge or cam, r2, attached tothe side yielding pressure onthework.

of` bar K, said cam` being depressibleybnt normally upheld byfa spring,r1. `Opposite the cam, on the bar p2, is a pin, r3, adapted to lopera-tein conjunction with thecam, in such manner that when the head J movesforward the pin r3 will4 ride over the inclined top ot' the cam, and thebar p2, by its spring p4, will be held toward the head J, with its pinq2 in position to wipe over and depress the part o2 of the hammerlever.i This continues until the stroking-head J reaches its forward position,and has pushed forward, stretched, and

folded the upper over `the last, at 'which time the hammer-lever clearsthe pin, and the hamj mer or boltl2 descends and drives the tack.

. When the head J movesback, the cam rf (depressed during the forwardmovement by the overriding pin r3, but now released and returned `to itsnormal position) wipes, with its side incline, against the pin r3, andsoforces back the bar p2 far enough to cause the upper pin g2 to clear thehammer-lever.` i

I propose adding to my machine a deviceA for feeding and presenting thetacks to the action of the driving bolt `orihammer; but

the combination of a tack feeding and driv` ing device with my system`of llasting will be the subject of a separateapplicationfor at patent.

The movementand action lof the strokinghead are designed to imitate, asfar as possible, hand-work. i 4

l'lhe head has a wiping or 'stroking action,

which tendsto properly draw and stretch the leather-a result which isfurthered by makin g .the acting face of the head of rubber or othermaterial that will take hold of the leather.

As soon as the head has `performed its work and the tack has beendriven,the head is `then raised by the lifting-bar far enough to' clear theleather, and is then retracted.

The imode of connecting the head with its stock also enables me to exerta powerful but I am aware that, in j machineryl for lasting boots andshoes, a horizontally-moving slide has been employed to fold over theedge of the leather into position to receive the tack or `nail.- I amalso aware `that a nail driving mech# anism has been combined with sucha slide.1A

Iclaim neither of"these'features.` i i i `Having described my invention,what claim, and desire to secure byLettersvBat# ent,is-.` i i i 1. In amachine for lasting bootsandshoes;

the combination, substantially as shown and described, with a jackmovable-inrequired directions, of a vibratory strokinglhead,1 whichmoves to and from the work in the arc of a circle, at the timesandiintthemanner stated.`

2. Thevibrating strokinghead, providedfon its acting face with rubber oranalogousmaterial, in combination with the jack i or i work-` support,said lparts beingi for operationlas shown and `set forth. 7 i t i 1 vf3. The combinationfwith an adjustable jack or worksupport, of astroking-head having driving mechanism and jack or work-support, anup-and-down and to-and-fro movement, substantially as set forth.substantially as shown and set forth.

4. The stroking-head, vibrating upon an FREDERIC S. HUNT. axis, so as tomove to and from the Work in Witnesses: i the are of a circle, as hereinshown and de- C. M. HINCKLEY,

scribed, in combination with the tack or nail W. E. BOARDMAN.

